Water-grate



J; c. GIBSON,

WATER GRATE.

APPLICATION FILED MAR. 2, 1920.

1 ,366,377, Patented Jan. 25, 1921.

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WATER GRATE. APPLICATION FILED MAR. 2. 1920.

Patented Jan. 25, 1921.

2 SHEETS-SHEET 2.

UNITED STATES;

PATEilT @FFICE.

JOHN G. GIBSON, OF ATLANTIC CITY, NEW JERSEY.

WATER-GRATE.

Application filed March 2,

- cation.

This invention, generally stated relates to steam and hot water boilers employing forced or induced draft and has more particular relation to the providing of certain new and novel sectional hollow grates therefor which may be formed integral with the water-logs of a boiler section at the time of manufacture of the boiler or which may be installed in existing boilers without effecting change in the constructionthereof.

The invention consists of the improvements hereinafter described and finally claimed.

The nature, characteristic features and scope of the invention will be more fully un derstood from the following description taken in connection with the accompanying drawings forming part hereof, and in which:

Figure 1, is a top or plan view of a plurality of detachable gratebars,

Fig. 14, is a view in side elevation of Fig. 1 viewed from the left hand side thereof,

Fig. 3, is a fragmentary viewillustrating details of construction,

Fig. l, is an end View of a pair of gratebars illustrating the manner of interlocking same,

Fig. 5, is a fragmentary view of a gratebar in side elevation,

Fig. 6. is a view in horizontal section taken upon the line 6-6 of Fig. 5, and

Fig. 7 is a fragmentary view illustrating a grate-bar formed integral with the water leg of a boiler section.

For the purpose of illustrating my invention I have shown in the accompanying drawings several forms which are at present preferred by me. since the same have been found inv practice to give satisfactory and reliable results, although it tobe understood that the various instrumentalities of which my invention consists can be variously arranged and organized and that my invention is not limited to the precise arrangement and organization of the instrumentalities as herein shown and described.

Referring to the drawings and more particularly to Figs. 1. to 6, inclusive, 1O desig- V Specification of Letters Patent.

Patented Jan. 25, 1921.

1920. Serial No. 362,752.

nates the grate bars, which are longitudinally disposed and are hollow for the circulation of water therethrough, each end of said bars being provided with a screwthreaded opening with'which piped connection is had with the circulating system of a boiler. The sides of the grate bars are each provided with a plurality of spaced, vertically disposed semi-cylindrical grooves 11 which extend from top to bottom of a grate bar. In practice the grate-bars are posia tioned side by side in abutting position so that adjacent grooves 11 form tubular channels as clearly shown in Fig. 1. Such gratebars are supported by a suitable part of a boiler setting. Fitted snugly within each channel of abutting grate bars and resting upon the annular flanged portion 12 thereof is a vertically disposed tubular section 14 the opening through which is in register with an opening 13 formed by said flanged portions 12. The upper end'of each tubular section is provided with a dome 15 apertured as at 16 for the passage therethrough of air under pressure and in the form of jets. In order that jets of air may have unrestricted egress through the apertured dome of the tubular sections the upper surface of each grate-bar immediately adjacent a groove 11 is countersunk as at 17, it being understood that the dome tops are substantially flush with the upper surface of the gratebars. Such countersunk portions thus provide a recess in concentric relation with each channel. and each tubular section. The tubular sections may be readily removed and replaced in the event of the egress openings becoming clogged. One grooved face of each gratebar is provided with horizontally disposed, spaced, recesses 18, there .beinga recessed portion between adjacent grooves 11. The opposite face of a grate-bar is provided with ribs 19 adapted to co-actively engage with said portions whereby adjacent gratebars may be interlocked. The recessed and ribbed ljlOltlOIlS preclude air seeping up between adjacent grate-bars On the con trary all air must pass up through. the tubular sections 14 so that an equal distribution of air is spread over the grate-bars; Air passing up between the grate-bars tends to cause a bed of coals thereon to burn much faster-at that place, but by reason of. the properly spar-ed tubular sections 14 no such ill effects are experienced. The sidewalls of a grate are shaped to follow the curves of the grooves 1i so that approximately the same thickness of metal is present through out a gratedoar. This provides for a cooling surface of uniformity.

In Fig. 7, a grate-bar is shown cast integral with a water leg of a boiler.

It will now be apparent that I have dc vised a novel and useful construction which embodies the features of advantage enumerated as desirable in the statement of the invention and the above description and while I have in the present instance shown and described thepreferred embodiment thereof which has been found in practice to give satisfactory and reliable results it is to be understood that the same is susceptible of modification in various particulars without departing from the spirit or scope of the invention or sacrificing any of its advantages.

lVhat I claim is:

1. In a grate construction of the clniracter stated a plurality of grate-bars the side walls of which are vertically grooved so that the grooves of adjacent grate-bars form channels, a ledge located adjacent the lower portion of each groove and a tube section titted within each channel and resting upon said ledge, said tube-section being provided with a perforated dome.

2. In a grate construction of the character stated a plurality of grate-bars the side walls of which are vertically grooved so that the grooves of adjacent grate-bars form channels, the upper surface of a grate-bar being recessed immediately adjacent said grooves, a ledge located adjacent the lower portion of each groove and a tube-scction fitted within each channel and resting upon said ledge, said tubese ction being priv" with a perforated dome, the domes of tube-sections being substantially flush with the upper faces of said grate-bars.

3. n a rate construction of the character stated a p urality of grate-bars one side wall of each grate-bar being horizontally recessed and the other side being provided with a ribbed portion for engaging an adjacent receased portion. the side walls of each gratebar being grooved vertically so that adjacent rooves form channels, a ledge located adjacent the lower part of each groove and atube section fitted within each channel and resting upon said ledge, said tube-section being provided with a perforated dome.

4. In a grate construction of the character stated a plurality of grate-bars the side walls of each gratebar being vertically reeessed so that recesses in adjacent gratebars form channels. one side wall of each grate-bar being horizontally recessed bctween adjacent vertical recesses and the other side wall of each grate-bar being provided with a horizontal. rib extended between adjacent vertical recesses for co-acting with said horizontally recessed portions and a hollow member fitted within each channel each hollow member being provided with a perforated closure the lower end of each hollow member lying in a plane below the said eo-acting recesses and ribs.

5. In a grate construct-ion of the character stated a plurality of grate-bars the side walls of which are vertically grooved so that the grooves of adjacent grate-bars form channels, and a tube-section fitted within each channel, said. tubesection being provided with a perforated dome.

G. In a grate construction of the character stated a plurality of grate-bars the side walls of which are vertically grooved so that the grooves of adjacent grate-bars form channels, the upper surface of a grate-bar being recessed immediately adjacent each groove and a tube-section fitted within each channel, said tube-section being provided with a perforated dome, the domes of said tubesections being substantially flush with the upper faces of said grate-bars.

7. In a grate construction of the character stated a plurality'of grate-bars one side wall of each grate-bar being horizontally recessed and the other side being provided with a ribbed portion for engaging an adjacent recessed portion, the side walls of each gratebar being grooved vertically so that grooves in adjacent grate-bars form channels, and a tube-section fitted within each channel, said tube-section being provided with a perforated dome.

S. In a grate construction of the character stated a plurality of grate-bars the adjacent faces of which are each recessed, the recesses of one grate-bar being arranged to register with the recesses of an adjacent grate-bar to form channels and a hollow member fi ted within each channel the upper portion of which member is provided with a perforated closure there being a recessed portion in the upper faces of said grate-bars immediately surrounding each of said perforated closures.

9. In a grate construction of the character stated a plurality of grate-bars the adjacent faces of which are each recessed. the recesses of one grate-bar being arranged to register with the recesses of an adjacent grate-bar to form channels. and a hollow member titted within each channel the upper portion. of which member is provided with a perforated closure there being a countersunk portion in the upper faces of said grate-bars immediately surrounding each of said perforated closures which closures and countersunk portions are so arranged with respect to one another that air passing up through said members egresses therefrom in the form of a plurality of small. jets which are spread over a grate-bar area.

10. In a grate construction of the character stated a plurality of hollow grate-bars the adjacent outer faces of which are each recessed, the recesses of one grate-bar being arranged to register with the recesses of an adjacent grate-bar to form channels, the inner walls of each grate-bar being reinforced opposite each recess and a hollow member fitted Within each channel the upper portion of which member is provided with a perforated closure.

11. In a grate construction of the character stated a plurality of grate-bars the adj acent faces of which are each recessed, the recesses of one grate-bar being arranged to register with the recesses of an adjacent grate-bar to form channels and a hollow member fitted within each channel the upper portion of which member is provided with a perforated closure.

In testlmony whereof I have hereunto signed my name.

JOHN Gr.- GIBSON. 

